Abstract: The precursor PbTi(OCH₂CH₃)_6-y(acac )_y of nanocrystalline PbTiO₃ was prepared by the electro chemical dissolution of titanium for 4 h at 50　℃ and then of lead for 2　h at 40　℃ in an ethanol solution of 0.03　mol/L (Bu₄N)Br. IR and Raman spectroscopy were used to investigate the structure of the precursor. The results show that the precursor contained acac group, which could prevent the precursor from gathering. TG-DT, XRD, and TEM we re used to investigate the structure of nano-sized PbTiO₃. The xeroge l of 10　nm was obtained by drying in vacuum for 24　h. PbTiO₃ with a narrow size distribution of 10~15 nm was prepared by heating it at 700　℃ fo r 2　h.

Key words: electro-chemical, lead and titanium ethoxide complexes, sol-gel, nanocrystalline PbTiO₃